A Novel Spectrum Borrowing Scheme between Heterogeneous Networks

The instable user behavior and the burst traffic usually induce low utilization of spectrum resource in single wireless network. This paper proposes a novel spectrum borrowing scheme which allows spectrum borrowing between heterogeneous wireless networks to more efficiently make use of limited radio resource. The proposed scheme is based on the model composed of TD-SCDMA (time division-synchronous code division multiple access) and WLAN (wireless local area network). To ensure the reliable cognitive radio link and the real time frequency assignment coordination, proposed scheme adopts a channel reserved mechanism with channel borrowing prediction algorithm. Performance simulation results indicate that proposed scheme get higher spectrum utilization efficiency than legacy FCA (fixed channel allocation) or HCA (hybria channel allocation) algorithm, and Qos (quality of service) in both networks are guaranteed. Higher overall system throughput is gained, too.